Data show that China is the world's annual new construction of the largest countries in each of the two billion square meters
New area , Stabilized Soil Mixing Plant 40% of the world consumption of cement and steel , but only last 25-30 years.In contrast, a much longer life expectancy in developed countries the building , such as the UK , the average life expectancy of 132 buildings Years, the U.S. life expectancy reached 74 years of construction . On the other hand , the main material constituting the cement concrete ,Is also facing serious challenges : precast concrete plant firing mainly in large formation of limestone and clay ,Every produce 1 ton of cement , it produces nearly one ton of carbon dioxide in the anthropogenic emissions of greenhouse gases , about
5% from cement production .
没有评论:
发表评论